PI7C9X754FFE - Quad UART with 64-Byte FIFO | Diodes Incorporated
部品番号: PI7C9X754FFE ✓ 生産中PI7C9X754FFE 概要
A UART, or universal asynchronous receiver/transmitter, is a serial interface controller that converts parallel data into framed serial signals and receives framed serial data in parallel form. Within the broader semiconductor hierarchy, a quad UART belongs to the interface IC family, which sits under integrated circuits and supports communication between processors, transceivers, sensors, and peripheral equipment. Four integrated channels can reduce component count and simplify firmware resource allocation compared with separate single-channel UART devices.
The PI7C9X754FFE's defining verified features are its four UART channels, 64-byte FIFO buffer, RS485 controller capability, IrDA 1.1 support, and 80-LQFP surface-mount package. The FIFO helps decouple received-byte processing from the serial receiver, reducing the amount of immediate data-handling required by the host processor. This is particularly useful where several ports receive bursts of data or where deterministic interrupt servicing is important.
The 80-pin LQFP provides the physical lead count needed for four full-featured UART channels. Pin assignment, logic levels, electrical limits, clock requirements, flow-control features, and exact supported data rates were not included in the verified source snippets and must be confirmed in the manufacturer datasheet before schematic capture or PCB routing.
Typical uses include industrial serial concentrators, multi-port instrumentation, embedded control equipment, RS485-connected sensor nodes, and IrDA-capable short-range infrared links. The device is also appropriate for test and measurement systems that expose several asynchronous serial ports through a common controller.
Designers should verify pin multiplexing, interrupt topology, peripheral clock requirements, and FIFO behavior in the datasheet before finalizing the PCB. Logic-level compatibility, RS485 transceiver selection, line termination, and isolation must also be confirmed against the external circuitry rather than assumed from the UART controller specification.
This page consolidates verified distributor product information, package and feature details, purchasing data, application guidance, and substitution constraints. Because the supplied evidence does not identify a verified pin-to-pin replacement, the alternatives section does not present unverified same-package parts as drop-in options.
ドロップイン代替品: PI7C9X754FFE — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストPI7C9X754FFE 最大定格＆電気的特性
| Device Type | Quad UART interface IC |
| Number of UART Channels | 4 channels |
| FIFO Buffer | 64 bytes |
| RS485 Controller Support | Supported |
| Infrared Support | IrDA 1.1 |
| パッケージ | 80-pin LQFP |
| Package Body Size | 12 mm x 12 mm |
| 実装タイプ | Surface mount |
PI7C9X754FFE 12 mm x 12 mm ピン配置ガイド
PI7C9X754FFE (12 mm x 12 mm パッケージ) のピン配置。 このパワーデバイスは、ゲート、ドレイン、ソース端子を備えています。非極性パッケージの場合、正確なピン1の向きとフットプリントの詳細については、メーカーのデータシートを参照してください。主な用途には、電源設計、モータ駆動、負荷スイッチングがあります。
詳細なピン配置データはありません: PI7C9X754FFE.
詳細は データシート をご参照ください。
主な用途
PI7C9X754FFE の用途: 6 件s: Industrial Serial Concentrator, RS485 Sensor Gateway, IrDA Short-Range Infrared Link, Embedded Instrument Interface, Test and Measurement Front Panel, Multiport Communications Controller.
Industrial Serial Concentrator
The PI7C9X754FFE fits an industrial serial concentrator because it consolidates 4 UART channels and a 64-byte FIFO into one 80-LQFP device. A host processor can route four external instruments or controllers through a common interface rather than requiring four separate UART packages. The FIFO can batch incoming bytes and reduce interrupt servicing overhead during short data bursts. The designer must still add the appropriate external RS485 transceivers, isolation, surge protection, and wiring protection, and must confirm the device's operating temperature and electrical limits in the manufacturer datasheet.
おすすめ
RS485 Sensor Gateway
For an RS485 sensor gateway, the PI7C9X754FFE provides 4 UART channels with a 64-byte FIFO while its verified RS485 controller capability supports UART-side control functions. The gateway can connect multiple sensing or actuator nodes and transfer their data through a host processor. The controller does not replace an RS485 line transceiver, so the design still needs polarity handling, driver enable control, cable termination where required, galvanic isolation if specified, and surge protection appropriate to the installation environment.
おすすめ
IrDA Short-Range Infrared Link
The PI7C9X754FFE is appropriate for an IrDA 1.1 short-range infrared endpoint when verified IrDA support is confirmed against the required operating mode and data rate. Its 4 UART channels permit an embedded controller to manage an infrared link alongside other asynchronous ports, while the 64-byte FIFO helps buffer received traffic. An external IrDA-compatible optical transceiver is still required because a UART controller does not directly provide infrared light emission or reception. Firmware must also implement the framing and timing behavior required by the selected optical link.
おすすめ
Embedded Instrument Interface
The PI7C9X754FFE can serve as the multi-port serial interface in an embedded instrument that must communicate with sensors, actuators, or service equipment. Four UART channels reduce the number of separate communication controllers, and the documented 64-byte FIFO helps separate serial reception from the processor's measurement workload. The 80-LQFP, 12 mm by 12 mm package requires adequate board area and careful pin escape routing. Logic thresholds, peripheral clocking, interrupt mapping, and any flow-control signals must be verified directly from the manufacturer datasheet before layout release.
おすすめ
Test and Measurement Front Panel
The PI7C9X754FFE is suitable for a test-and-measurement front panel requiring several asynchronous connections to instruments, computers, or service interfaces. Four UART channels can support multiple communication paths, and the 64-byte FIFO allows received data to be accumulated before the controller processes it. This can be valuable when several ports generate short command responses around the same time. Board-level isolation and grounding must be designed for the signals present, while maximum baud rate, electrical levels, and peripheral timing remain items to confirm in the manufacturer documentation.
おすすめ
Multiport Communications Controller
The PI7C9X754FFE fits a communications controller that must consolidate four asynchronous ports while preserving orderly data handling. Its 64-byte FIFO can reduce the frequency at which the host must service every received character, making the arrangement practical for moderate-volume command and telemetry traffic. The package's 80 leads provide access to four complete UART channels, but the large footprint can make routing more difficult than with a compact quad-UART package. Engineers should verify pin multiplexing, interrupt sharing, peripheral clock requirements, and reset behavior in the manufacturer datasheet.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PI7C9X754FFE — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Device Type | Quad UART interface IC |
| Brand | Diodes Incorporated |
| Package | 80-pin LQFP, 12 mm x 12 mm |
| Number of UART Channels | 4 channels |
| FIFO Buffer | 64 bytes |
| RS485 Controller Support | Supported |
| — | IrDA 1.1 |
| Starting Listed Price | $11.8754 as of 2026-10-29 |
主な差別化要因
- Four UART channels in one interface IC （vs A single-channel UART device)
- Integrated data buffering （vs A UART implementation without the documented FIFO)
- Multiple serial-control functions （vs A basic UART-only interface IC)
設計ノート
Reserve the full 80-LQFP footprint on a 12 mm by 12 mm land pattern and verify it against the manufacturer package drawing before PCB release. The 80-lead package requires substantially more routing space than a compact quad-UART package. Place decoupling capacitors close to the supply and ground pins, keep serial outputs away from sensitive analog or clock nets, and provide adequate escape routing for every peripheral signal.
Confirm the operating supply range, absolute maximum ratings, input thresholds, output levels, and peripheral clock requirements from the manufacturer datasheet before connecting external logic. The supplied evidence does not include those electrical limits, so no voltage or capacitor value should be assumed. Use a supply rail with appropriate noise and stability margin, and size local bypass capacitance according to the manufacturer's recommendations rather than generic guidance.
Do not treat UART controller support as a complete RS485 physical layer. The PI7C9X754FFE still requires the correct external RS485 transceiver, and long cables may need termination, controlled grounding, isolation, and surge protection. Likewise, IrDA 1.1 operation requires a compatible optical transceiver. Confirm the exact driver-enable, interrupt, modem-control, and flow-control pin functions before assigning board signals.
コンプライアンス情報
The verified web snippets did not state compliance status. Obtain the current manufacturer datasheet and applicable material or environmental declaration before production release.
